Rock-drill.



PATENTBD JULY 21, 190s. y'

P. REIN HALTER.

ROCK DRILL'.

APPLICATION FILED AUG. 1, 1902.

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ROGK'DRILL.

APPLI-OATION FILED AUG. 1| 1902.

2 SHEETS-SHEET 2.

N0 MODEL.

LU-i Mwave@ No. 734,365. y

UNITED STATES Patented July 21, 1903.

PATENT OFFICE.

PETER REINHALTER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TOQUINCYELEOTRIC DRILL COMPANY, A CORPORATION OF NE'W JERSEY.

A ROCK-DRILL.

SPECIFICATION forming part of' Letters Patent No. 734,365, datedvJuly21, 1903.

Application tiled August 1, 1902. Serial 110.117,929. (No model.) Y

.To all whom t may concern:

Be it known that I, PETER REINHALTER, a citizen of the United States,residing in the city and county of Philadelphia, State of Pennsylvania,have invented a new and useful Improvement in Roclc'Drills, of which thefollowing is a specification.

My invention consists of a new constructio of a rock-drill which isespecially adapted to be operated by means of power taken from anelectric motor or other source of energy, whereby the great expenseheretofore incurred in the installation of rock-drills and plantswherein steam engines, hydraulic, pneumatic, or similar apparatus areemployed is obviated, as is also the expense ordinarily incurred inconnecting the drills with their .motors and in providing for thefrequent .sleeve which is immovable longitudinally, but

capable of rotary movement and adapted afterl being rotated lslightly tobe locked in position by a novel construction of rollerclutch, provisionbeing also made for restoring the cams of said clutch to their originalor normal position during the reciprocation of the drill-rod.

It also consists of novel details of construction, all as will behereinafter set forth, and pointed out in the claims.

Figure 1 represents a longitudinal sectionalview of a rock-drillembodying my invention, several of the parts being shown in elevation.Fig. 2 represents a longitudinal sectional View of my novel constructionof rock-d'rill, showing also means employed for feeding the sameforwardly at the desired periods. Fig. 3 represents a plan View showingthe beveled gear ing and its adjuncts whereby the drill is 0p-` erated.Fig. 4 represents a section on line oc, Fig. 1, showing relativepositions of the roller-clutch and its adjuncts. Fig. 5 represents asection on line a: w, Fig. 1, showing the drill-rod and roller-clutchremoved. Fig. 6 represents a plan view of a portion of Fig. 2, showingthe devices for feeding the drill forwardly. Fig. 7 represents a`sect-ion on line y y, Fig. 6. Fig. ti represents a side elevation,partly in section, of the motor-casing and the gearing whereby the drillis operated.

Similar numerals of reference indicate corresponding parts in thefigures.

Referring to the drawings, 1 designates a casing of an electric or othermotor, upon the shaft 2 of which is mounted the bevel-pinion 3, whichmeshes with the beve1-gear 4, which is secured to or mounted on thecrank-shaft 5, which is mounted in suitable bearings 6 in the casing 7of the rock or other drill'S.

9 designates cranks or crank-pins, upon l which are mounted theconnecting-rods 10,l whereby the pins l1 are actuated or reciprocated,said pins being secured to the crosshead l2, which is provided with theballbearing devices 13 and 14 on opposite sides thereof.

15 designates the drill-rod, the latter having on one extremity thereofthe nut or equivalent device 16, which may be secured to' said drill-rodby-any suitable means, the spring 17 being retained in position betweensaid nut 16 and the ball-bearing devices 14.

18 designates a spring having one end abutting against the ball-bearingdevices 13,while its other end contacts with the head 19, which iscarried by or secured to the drill-rod 15,

said head 19 having the inclined tongues 20 roo cams or rollers beingrotatable and mounted on the rods 26, which latter are supported in thecasings 27 or by any other suitable means, it being understood that saidcams or rollers are rotatable to a certain extent freely upon said rods26, but that the latter are fixed or non-rotatable in said casings 27.

The exterior periphery of each of the cams or rollers 25 is roughened ormilled, so that there is a frictional contact between their outersurfaces and the contiguous surfaces of the sleeve 22, it being noticedthat the cams or rollers and their adjuncts normally appear as seen inFig. 4, so that a slight rotation of said cams or rollers and sleeve 22is permitted when the drill-rod moves forward or to the left until thecontact of the thicker portions of the cams or rollers prevents furtherrotation of said sleeve. When the drillrod moves backwardly or to theright, the torsional effect of the springs 30 will cause said cams orrollers to assume the position seen in Fig. 4 again, said springshavingtheir extremities31 secured in said cams or rollers, as will beapparent from Fig. 1.

It will be understood that it is the torsional effect of the springs 30,together with the eccentric mounting of the rollers 257 that preventslocking of the sleeve on the backward movement of the drill-rod, thesaid springs taking effect to throw the cams or rollers 25 out ofengagement with the sleeve as soon as the drill-rod starts on itsbackward movement.

32 designates the forward extension of the d rill-rod, which projectsthrough the packing 33, contained within the nose-piece 34, said packingbeing held in position by the plate 35, which latter is secured in placewithin the case 23, said extension having the socket 36 therein for thereception of the shank of the drill, cutter, or other tool.

When the head 19 reaches its extreme forward or left-hand position, itwill contact with and depress the nose 37 of the dog 38, which ispivotally mounted on the pin or other support 39, whereby the link 40,which is pivotally attached by the pin 41 to the rockarm 42, will beactuated, and with itsaid rock-arm, thereby oscillating the shaft 43,which is mounted in the bearings 44, attached to the plate or bed45,which is longitudinally mounted in the ways 46, as will be understoodfrom Figs. 6 and 7.

47 designates an arm mounted on the shaft 43 and having the pawl 4Spivoted thereto, said pawl having the nose 49, adapted to engage theteeth of the ratchet-whee1 50, which latter is mounted on the follower5l of the feed-screw 52, which is supported in suitable bearings 53 and54 below the plate or bed 45.

55 designates bevel-gearing, whereby the movement of the feed-screw canbe reversed by hand or otherwise, if desired. In practice I support thecrank-shaft 5 in a suitable bearing 56, wherein I locate also thebearing for the shaft 2, opposite to which is the pocket or chamber 57,wherein I locate the buffer of rubber or other material 58.

The operation is as follows: The rotation of the shaft 2 by the electricor other motor causes the rotation of the gear 4 and through theintermediate connections the reciprocation of the connecting-rods 10 andthe crosshead 12, the movement of which latter is im parted to thedrill-rod 15 by means of the cushioning devices or springs and theiradjuncts, as will be apparent to those skilled in the art. The forwardmovement of the head 19 of the'drill-rod will at first impart a rotarymovement to the sleeve 22, which rotation will be imparted to the camsor rollers 25 until the latter are locked tightly against said sleeveand further rotation of said sleeve is prevented. It will, however, beapparent that during the continued forward movement of said head thelatter and the drill-rod will be rotated by the coaction of the tonguesand grooves 2O and 21, as is evident. When the drill-rod, head, andtheir adjuncts move back- Wardly or to the right, the springs 30 willcause the cams or rollers 25 to resume their normal positions, as seenin Fig. 4. Vhen the head 19 reaches its extreme forward position, itwill contact with the nose 37 of the dog 38, whereby the shaft 43 willbe rocked, thereby actuating the feed-screw by means of the intermediatemechanism, (seen in Figs. 2, (i, and 7,) whereby the bed or plate 45,which supports the drill and its adjuncts, will be fed forwardly, as isevident.

It will be apparent that I have omitted from certain views certain partsclearly seen in other views for the sake of clearness of illustrationand that changes may be made inthe manner of locating and assembling thefeedi-ng devices and the mechanism for rotating the drill-rod which willcome within the scope of my invention, and I do not, therefore, desireto be limited to the exact construction I have herein shown anddescribed.

lt will be apparent that the crank-Wheels 59 are in practicecounterbalanced and made in one piece or integral with the crank-shaftand that the connecting-rods 10 are secured to the cranks by means ofthe bolts 60, which are secured in position by the nuts 61.

The nut 16 is locked upon the rod 15 by means of the head 62 ofthe screw63, and,'if desired, a dowel pin or pins 64 may be employed for furthersecurity, as seen in Fig. 1. I also locate in practice an oil shield orplate 65 on the shaft 2, whereby oil is prevented from being thrown ordischarged upon the motor. All the shaft and motor bearings areself-lubricating, and the motor within the casing 1 is provided with theball-bearing thrust 66, (seen in Fig. 8,) whereby all undue strains aretaken up or equalized, and I also provide the motor with a plurality ofopenings 67.

Having thus described my invention, what IIO I claim as new, and desireto secure by Letters Patent, is

l. In a rock-drill, a drill-rod, means for reciprocating the latter,means on said drill-rod for rotating a sleeve, means for locking saidsleeve after'its initial-rotation, whereby the continued forwardmovement'of said drillrod will cause its rotation and torsional meansfor automatically unlocking said sleeve as the drill-rod moves in thereverse direction.

2. In a rock-drill, a drill-rod, means for reciprocating the latter, ahead on said drill-rod,

- inclined tongues on said head, a sleeve surrounding said head,inclined grooves in said sleeve, cams located oppositely to said sleeveand torsional devices for rendering said cams inoperative as thedrill-rod moves in a backward direction.

3. In a rock-drill, a drill-rod, means for reciprocating the latter, ahead on said drill-rod, inclined tongues on said head, a sleevesurrounding said head, inclined grooves on said sleeve and cams locatedoppositely to said sleeve, in combination with torsional devices forrendering said cams inoperative as the drill-rod moves in a backwarddirection, devices for restoring said cams to their normal position andfeed mechanism automatically controlled by the movement of said sleeve.

4. In a rock-drill, a drill-rod, means for reciprocating the latter, ahead on said drillrod, inclined tongues on said head, a sleevesurrounding said head, inclined grooves in said sleeve and cams locatedopposit-ely to said sleeve, in combination with torsional springscoacting with said cams mounted to be actuated as the drill-rod movesbackward, to restore the cams to their normal positions.

5. In a rock-drill, a drill-rod, means for reciprocating the latter, ahead on said drillrod having inclined tongues, a sleeve surrounding saidhead and having inclined grooves therein coacting withsaid tongues, rodsmounted in proximity to said sleeve, cams rotatably mounted on saidrods, and springs connected with said cams to serve as torsion devicesfor restoring said cams to normal position. v

6. The combination of a rock-drill and drillrod, a bed or plate uponwhich said drill-rod is supported, a rock-shaft on said bed, ex-

tending longitudinally thereof, substantially parallel with saiddrill-rod, aldog adapted to be actuated by the movement of said drillvrod, a connection from said dog to said drillrod and mounted forpositive engagement with said dog to actuate the same as the drillrodmoves forward, a feed-screw located in proximity to said bed, andconnections from said rock-shaft to said feed-screw for operata chamberlocated oppositely to said bearings and provided with a buffer, adrill-rod, and

connections from said crank-shaft to said drill-rod for reciprocatingthe latter.

8. In a rock-drill, a motor, a crank-shaft, a bearing for the latter, abevel-gear mounted on said shaft, a bevel-gear meshing with said gear, ashaft upon which said gear is mounted, a bearing for the extremity ofsaid shaft located in proximity to the bearing for the crank-shaft, achamber located oppositely to said bearings and provided withv a buier,a drill-rod, connections from said crank-shaft to said drill-rod forreciprocating the latter, and an oil-shield located between said gearingand motor.

9. In a rock-drill, a cross-head, ball-bearing devices on saidcross-head, a drill-rod passing through said cross-head, a head on theforward extremity of said drill-rod, a nut on the rear end of said rod,means for lock'- ingl said nut in position, springs interposed betweensaid head and nut and said ball-1 bearing devices respectively, ashaft-bearing having a pocket, a bulfer in said pocket in line with saidnut, means coacting with said head for rotating said drill-rod, andconnections to said cross-head for reciprocating th latter.

PETER REINHALTER.

Witnessesr J oHN A. WIEDERSHEIM, E. HAYWARD FAIRBANKS.

